[Buildroot] [PATCH] infra/pkg-kconfig: do not rely on package's .config as a timestamp

[Yann E. MORIN <yann.morin.1998@free.fr>]

Peter, All,

On 2019-05-31 00:41 +0200, Peter Korsgaard spake thusly:
> >>>>> "Yann" == Yann E MORIN <yann.morin.1998@free.fr> writes:
> 
>  > Since linux-4.19, the kernel's build system internally touches its
>  > .config file.
> 
>  > However, we currently used that file as a timestamp to detect whether
>  > our kconfig fixups were to be (re)applied or not, which in turn is used
>  > to decide whether we should (re)build the package or not.
> 
>  > But with latest kernel versions, this timestamp heuristic is now broken,
>  > and we always rebuild the kernel on subsequent builds.
> 
>  > We fix that by introducing a spearate timestamp file of our own, which
>  > we know the kernel (or the kconfig-based packages, for that matters)
>  > does not use.
> 
>  > Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
>  > Cc: Thomas De Schampheleire <patrickdepinguin@gmail.com>
>  > Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
>  > Cc: Arnout Vandecappelle <arnout@mind.be>
> 
> Committed, thanks.

Thanks.

This is also a candidate for 2019.02.x, on which it applies cleanly.

Regards,
Yann E. MORIN.

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